NPPES file of Aug 9, 2026

Registered Dietitian in California

7,148 NPPES records list registered dietitian with a practice address in California, 18 per 100,000 residents, the 35th highest rate of 51. San Diego and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 97 of 143.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 133V00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

San Diego has the most, 504

  1. San Diego504
  2. Los Angeles487
  3. San Francisco427
  4. Sacramento232
  5. San Jose151

Registered Dietitian records in California

  1. Eileen Olmstead, RDRescue, CA 956721316109028
  2. Alana Olson, RDNSan Diego, CA 921091750155719
  3. Britney OlsonDavis, CA 956181790649523
  4. Caroline Olson, RDLa Quinta, CA 922531316598485
  5. Kimberly Olson, R.D.San Francisco, CA 941151619019486
  6. Kristin Olson, RDLoma Linda, CA 923571285386839
  7. Sarah Olson, MDA, RDRancho Cordova, CA 956701306445119
  8. Maria Olvera, RDSan Ysidro, CA 921731407085889
  9. Roula OmaryRoseville, CA 957471255921292
  10. Ofunneka Omekam, RDStockton, CA 952101942941455
  11. Makiko Omori, RDSan Francisco, CA 941431508334681
  12. Emina OngSan Diego, CA 921021215285531
  13. Encarnita OngjocoTorrance, CA 905021184135022
  14. Opeyemi OniCalabasas, CA 913021336853225
  15. Stephanie Ontiveros, RDCovina, CA 917231184376477
  16. Marily OppezzoSunnyvale, CA 940871487511242
  17. Heidi Oracion, R.D.Long Beach, CA 908221316956808
  18. Lindsay Orbeta, MS, RD, CSSDOakland, CA 946121922460294
  19. Guadalupe Orihuela, RDSanta Rosa, CA 954051164031746
  20. Amy Ornelas, R.D.San Diego, CA 921011710206081
  21. Carla Ornelas, RDDowney, CA 902401295458586
  22. Sarah Oropeza, MPH, RDNSan Diego, CA 921171710650478
  23. Crystal Orozco, RDNSacramento, CA 958111043681216
  24. Diana Orozco, RDAnaheim, CA 928021043935869
  25. Vanessa Orozco, RDCovina, CA 917231700754231
  26. Daisy Orozco-Meeker, RDLos Angeles, CA 900421104641836
  27. Mojgan Orsini, RDN, CDECanyon Country, CA 913871689191272
  28. Bernardo Ortega, RDVallejo, CA 945891689287534
  29. Elizabeth Ortega, RDNVentura, CA 930031518389899
  30. Gustavo Ortega, RDLos Angeles, CA 900081114783982
  31. Yvonne Ortega, MS, RDN, CSSDRedondo Beach, CA 902771104373802
  32. Kyla Orth, RDBakersfield, CA 933061255078481
  33. Adrienne Ortiz, MS, RDEdwards Afb, CA 935241750841961
  34. Alicia Ortiz, RDNBaldwin Park, CA 917061932821584
  35. Crystal Ortiz, RDNWest Covina, CA 917901073026324
  36. Delaney OrtizCarson, CA 907451124974662
  37. Katherine Ortiz, MPH, RDBell Gardens, CA 902011568987170
  38. Melissa Ortiz, R.D.Fresno, CA 937201376877431
  39. Christie Ortiz Archilla, RD, CDCESAnaheim, CA 928061740950450
  40. Shoshanah Orzech, R.D./CDECapitola, CA 950101831430438
  41. Teri Osalla, RDNLos Angeles, CA 900141669255766
  42. Janese Osborne, RD, CDEEureka, CA 955011508958877
  43. Fariba Oshidary, RDNMission Viejo, CA 926911265237119
  44. Jeanine Osler, R.D.Playa Vista, CA 900941346558145
  45. Amy Osmun, M.A., R.D.Costa Mesa, CA 926261134384175
  46. Andrew Ossa, RDNWhittier, CA 906061952860595
  47. Judith Osterloh, RDFresno, CA 937201821103276
  48. Tisha Ostrander, R.D.Newport Beach, CA 926631518243880
  49. Kathryn Ostrem, MED, RD, CDETehachapi, CA 935611598088387
  50. Olivia Ostunio, RDNOrange, CA 928681881577559

Source: CMS NPPES, primary taxonomy 133V00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 35 of 51 per resident

  1. Hawaii19
  2. Arkansas19
  3. Louisiana19
  4. California18
  5. Maryland18
  6. Nebraska18
  7. 50 states and D.C.20

Source: CMS NPPES, primary taxonomy 133V00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

5.4% of these records appear in a Medicare file, against 7.4% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. California5.4%
  2. United States7.4%

Registered Dietitian records in California, measured

  • In a Medicare file385 of 7,148 · 5.4% here, 7.4% nationally
  • In the CMS Doctors and Clinicians file531 · 7.4% here, 9.8% nationally
  • Not updated in five years or more3,904 · 54.6% here, 56.3% nationally
  • Median graduation year2014 · the 529 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 133V00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

7,148 NPPES records list registered dietitian (133V00000X) as their primary taxonomy with a practice address in California: 18 per 100,000 residents against 20 nationally (50 states and D.C.). San Diego has 504 of them (7%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Texas5,099
  2. New York4,724
  3. Florida3,443
  4. Pennsylvania3,083

States with a similar rate per 100,000

  1. Maryland18.2
  2. Louisiana18.5
  3. Nebraska18.1
  4. Michigan18.1

The largest states

  1. Texas5,099
  2. New York4,724
  3. Florida3,443
  4. Pennsylvania3,083
  5. Illinois2,870

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.